United States Lime & Minerals Inc.

United States Lime & Minerals Inc. operates limestone quarries and processing plants in Texas, Arkansas, Colorado, and Oklahoma. The company's core business of mining and processing limestone is an extractive industry with inherent environmental impacts, including habitat destruction, dust emissions, and potential water contamination from runoff.

A 2008 industry publication documented that the company's Marble Falls, Texas, plant was operating under an expired wastewater discharge permit from the Texas Commission on Environmental Quality (TCEQ). The facility was discharging process water into the Colorado River basin. While specific penalty amounts or recent enforcement actions were not detailed in the available evidence, operating with an expired permit indicates a lapse in regulatory compliance for a facility with direct impact on a major watershed. The company's operations fit the documented pattern of ecological disturbance common to surface mining activities.